Spike-tooth harrow.



J. EuPERGY.

SPIKE TOOTH HARROW.

APPLIOATION FILED NOV. 30, 191-2.

1,054,712; Patented Man 1, 1913.

2 SHEETB-SHBET 1-.

WITNESSES; INVENTEIFI WWW I f W i E aw A4,

ATFUFINEY COLUMBIA PLANOGRAPH 1:6..WA5HINGTON D c J. E. PERCY.

SPIKE TOOTH HARROW.

APPLIGATION FILED NOV. 30, 1912.

1,054,712., V Patented Man-4,1913.

2 8HBETSSHEET 2.

FEE-

WITNEEEIEi INVENTEIFI UNITED STATES PATEN T OFFICE.

JAMES EARLE PERCY, OF HOOSICK FALLS, NEW YORK, ASSIGNOR T0 WALTER A.WOOD MOWING AND REAPING MACHINE COMPANY, OF HOOSICK FALLS, NEW YORK, ACORPORATION OF NEW YORK.

SPIKE-TOOTH HARROW.

Reference may be had to the accompany ing drawings, and the referencecharacters marked thereon, which form a part of th1s specification.

Similar characters refer to similar parts in the several figurestherein.

Figure 1 of the drawings is a vertical cross-section of one of the sidebars of a spike-tooth harrow, showing in front elevation a spiketooth,one end of a tooth-bar, and the thimble and trunnion-bolt, whereby thetooth-bar is rockably mounted upon the side bar. Fig. 2 is a horizontalsection of the same taken on the broken line 2-2 in Fig. 1. Fig. 3 is avertical cross-section of the same taken on the broken line 33 in Fig.2. Fig. 4 is a view in perspective of a broken-away portion of thetooth-bar. Fig. 5 is a view in perspective of the thimble detached. Fig.6 is a view in perspective of the trunnion-bolt detached.

Certain objects of the invention are to provide a strong, durable andefficient trunnion-mounting for the tooth-bars of a spiketoo-th harrow;to facilitate the mounting of the toothbars upon the side bars or frameof the harrow; and to positively connect the tooth-bars with the sidebars or frame.

In carrying out my invention in its preferred form, I rockably mount theseveral ends of the tooth-bar upon the side bars or frame by means of athimble, whereby a spike-tooth is clamped upon the tooth-bar in theusual manner, and a separate trunnion bolt secured in positiveengagement with both the tooth-bar and the spike-tooth.

Referring to the drawings wherein the invention is shown in preferredform, 1 is the side bar or frame of a spike-tooth harrow, 2 is one ofthe tooth-bars, and 3 is a spiketooth mounted upon the tooth-bar. Thetooth-bar is U-shape in cross-section, as

Specification of Letters Patent.

Application filed November 30, 1912.

Patented Mar. 4, 1913. Serial No. 734,318.

shown in Fig. 3, and the end of the toothbar is inserted within athimble, 4, which receives and supports the end of the tooth-bar in theusual manner. The thimble, 4:, has a pair of apertured clamp-arms, 5,which project forwardly beyond the tooth-bar, above and below the same,through the apertures in which arms the spike-tooth, 3, passes, thetooth being clamped upon the bar, 2, by means of a screw, 6, mountedupon the thimble in position to engage the rear side of the tooth-bar,as shown in Figs. 2 and 3. The screw, 6, is mounted upon the thimble bymeans of a nut, 7, through which the thrust of the screw is transmittedto the thimble. The end of the thimble is provided with a trunnion-boltaperture, and the side bar, 1, is provided with a similar trunnion-boltaperture, said apertures being adapted to receive a removabletrunnionbolt, 8, inwardly insertible therethrough and having a head, 9,adapted to engage the outer side of the sidebar or frame. The bearingportion of the trunnion-bolt, adjacent to its head, is straight andcylindrical, while the inner end of the shank of the bolt is offset inthe form of a hook, 10, adapted to engage an aperture, 11, in the rearwall of the tooth-bar, whereby the tooth-bar is positively connectedwith the side-bar, 1, so that longitudinal movement of the toothbarrelatively to the side-bar is prevented. The inner hook-end of thetrunnion-bolt is formed with a shoulder, 12, which abuts against theinner side of the rear wall of the tooth-bar to limit the rearwardmovement of the hook-end of the trunnion-bolt. Intermecliately of itsends the trunnion-bolt is forwardly offset at 13 to bear against therear side of the spike-tooth, 3, said offset portion being formed with ashoulder, 14, adapted to engage the inner rear corner of thespike-tooth, as shown in Fig. 2.

When the parts are assembled in the relative positions shown in Figs. 2and 3, and the set-screw, 6, is tightened, the spike will be securelyclamped upon the tooth-bar; the tooth-bar will be clamped upon thethimble; longitudinal movement of the tooth-bar will be positivelyprevented by the hook-end, 10,

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hook-shaped end portion, 10 of the trunnion-bolt are of such shape anddimensions as to permit the bolt to be inserted inwardly through therespective apertures in the sidebar, 1, and the thimble, 4, before thetoothbar, 2, and spike-tooth, 3, are placed in position. After thetrunnion-bolt has been inwardly inserted through the side-bar andthimble and before the spike-tooth is inserted through the clamp-arms,5, the side-bar, 2, can be readily inserted within the thimble inposition to receive the hook-end, 10, of the trunnion-bolt, after whichthe spiketoot-h, 3, is inserted and the parts clamped together by meansof the screw, 6.

What I claim as new and desire to secure by Letters Patent is- 1. In aspike-tooth harrow the'combination with a side-bar provided with atrunnion-aperture; of a thimble; atooth-bar; a spike-tooth; atrunnion-bolt inwardly insertible through the trunnion-aperture in saidside-bar, having a head engageable with the outer side of the side-barand a bearing portion occupying said aperture; and means for detachablyclamping together said trunnion-bolt, thimble, tooth-bar and spiketooth.

2. In a spike-tooth harrow, the combination with a side-bar providedwith a trunnion-aperture; of a thimble; a tooth-bar; a spike-tooth;means for clamping together said thimble, tooth-bar and spike-tooth; anda trunnion-bolt inserted through the trunnion-aperture in said side-bar,having on its outer end a head engageable with the outer side of theside-bar and having its inner end offset and secured in engagement withsaid tooth-bar and said spike-tooth.

3. In a spike-tooth harrow, the combination with a side-bar providedwith a trunnion-aperture; of a thimble provided with a trunnion-apertureand having apertured clamp-arms; a tooth-bar having its end in ,sertedwithin said thimble; a spike-tooth inserted through the aperturedclamp-arms of the thimble in engagement with one side of said tooth-bar;screw-mechanis1n mounted upon said thimble engageable with the oppositeside of said tooth-bar; and a trun- -nion-bolt inwardly insertiblethrough the respective trunnion-apertures in the sidebar and thimble,said trunnion-bolt having ahead adapted to engage the outer side of saidsidebar and a bearing-portion adjacent to said head adapted to occupythe trunnionaperture insaid side-bar and having its shankinsertedthrough the trunnion-aperture in said thimble and secured within thethimble.

4:. In a spike-tooth harrow, the combination with a side-bar providedwith a trunnio-na-perture; of a thimble provided with atrunnion-aperture, and having apertured clamp-arms; a tooth-bar havingits end in serted within said thimble and provided with a hook-aperture;a spike-tooth inserted through the apertured clamp-arms of the thimblein engagement with one side of said tooth-bar; screw-mechanism mountedupon said thimble engageable with the opposite side of said tooth-bar;and a trunnionbolt having a head adapted to engage the outer side ofsaid side-bar and a bearing-portion adjacent to said head adapted tooccupy the trunnion-aperture in said side-barand having its shankinserted through the trunnionaperture in said thimble and terminating ina hook secured in the hook-aperture in the tootlrbar.

5. In a spike-tooth harrow, the combina-' tion with a side-bar providedwith a trunnion-aperture; of a thimble provided with a trunnion-apertureand having apertured clamp-arms; a tooth-bar having its end. insertedwithin I said thimble and provided with an aperture; a spike-toothinserted through said apertured clamp-arms in engagement with one sideof said tooth-bar; screw-mechanism mounted on said thimble engageablewith the opposite side of said tooth-bar and a trunnion-bolt insertedthrough the respective trunnion-apertures in said side-bar and saidthimble, having a head engageable with the outer side of said side-bar,and a shank offset to engage said spike-tooth and terminating inashouldered hook adapted to engage the aperture in said tooth-bar, saidshank being of such shape and dimensions as to be insertible inwardlythrough said trunnionapertures.

In testimony whereof I have hereunto set my hand this 20th day ofNovember 1912. i

J. EARLE PERCY. lVitnesses CLARENCE H. BAKER, F. B. 'TUTTLE.

, Copies-of this patent may be obtained for five cents each, byaddressing the fiommissioner of .Patents. Washington. ZDJG.

